feat: enable arbitrary data signing

[petertonysmith94]

• Closes Implement signed-type data #3715

Release notes

In this release, we:

• Enabled hashing + signing of bytes, with signMessage and hashMessage now accepting a Uint8Array of bytes.

Summary

The following methods now accept a HashableMessage:

• Signer.signMessage
• WalletUnlocked.signMessage
• hashMessage

The HashableMessage has two different formats:

• Backwards compatibile format (string input)

// Will follow the same format as before for backwards compatibility: `sha256(toUtf8Bytes(<message))`
const message: HashedMessage = 'some-string';

• EIP-191 format

// Will use the following format: `0x19 <0x46 (F)> <"uel Signed Message:\n" + len(message)> <message>`
let message: HashedMessage = { raw: new Uint8Array([0x01, 0x02]) };
message = { raw: 'some-string' };

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)

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[luizstacio]

we should ensure the current method does not work; a break change here can be catastrophic.

Like bako predicate, which uses the current sign message to verify ownership,

[petertonysmith94]

Implemented a backward compatible approach.
c59c1db

All previous hashes remain unchanged

[github-actions]

Coverage Report:

Lines	Branches	Functions	Statements
77.15%(+0%)	70.85%(+0.16%)	75.23%(-0.07%)	77.15%(+0%)

Changed Files:

Ok	File (✨=New File)	Lines	Branches	Functions	Statements
🔴	✨ packages/abi-coder/src/utils/scriptData.ts	0% (+0%)	0% (+0%)	0% (+0%)	0% (+0%)
🔴	packages/account/src/account.ts	81.03% (+0.45%)	72% (+0.77%)	82.5% (+0%)	80.79% (+0.45%)
🔴	packages/account/src/connectors/fuel-connector.ts	30% (+1.43%)	100% (+0%)	4.54% (-0.22%)	30% (+1.43%)
🔴	packages/account/src/connectors/fuel.ts	96.75% (+0.02%)	90.66% (+0%)	93.33% (+0%)	96.87% (+0.02%)
🔴	packages/account/src/providers/provider.ts	67.53% (+0.58%)	59.8% (+2.73%)	68.04% (+0%)	67.29% (+0.56%)
🔴	packages/errors/src/test-utils/expect-to-throw-fuel-error.ts	91.66% (-0.34%)	88.88% (+0%)	100% (+0%)	91.66% (-0.34%)